Effect of structural instability between 80 and 300 K on superconductivity of YBa2Cu3Ox
Linhai Sun, Yening Wang, Huimin Shen, Xiaohua Cheng
DOI 10.1103/PhysRevB.38.5114 · Physical Review B
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Abstract
The lattice parameters of YBa2Cu3Ox have been carefully measured by x-ray polycrystalline diffraction between 80 and 300 K. As a function of temperature, they reveal a large variation above Tc, which is mainly attributed to a few abrupt changes near certain temperatures rather than thermal expansion. Such structure instability, accompanied with the appearance of internal friction peaks and elastic softening, is related to oxygen content x. The instability near 120 K was found to be related to the superconductivity at 90 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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